/Engine/Source/Runtime/AIModule/Classes/BehaviorTree/BTCompositeNode.h
Called when start enters this node bUseNodeActivationNotify must be set to true for this function to be called Calling INIT_COMPOSITE_NODE_NOTIFY_FLAGS in the constructor of the node will set this flag automatically
virtual void NotifyNodeActivation ( [FBehaviorTreeSearchData](API\Runtime\AIModule\BehaviorTree\FBehaviorTreeSearchData) & SearchData ) const